Well, that "can't stand" would be a plus in my eyes. The proper inflection and/or context doesn't always come through in online communication.

I would have answered her question by saying "Yes, I am!" and seeing how she responded.

Personally, there are very few of the "must haves/can't stands" that would raise my eyebrow about a match. They're just canned answers and most people would pick more than 10 of them if given the opportunity.